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<div class="textblock"><code>#include &lt;<a class="el" href="secp256k1_8h_source.html">secp256k1.h</a>&gt;</code><br />
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<p><a href="lax__der__privatekey__parsing_8h_source.html">Go to the source code of this file.</a></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ab0172ae6ae0adcf65b3d94960ece8e31"><td class="memItemLeft" align="right" valign="top"><a class="el" href="secp256k1_8h.html#aebd5ca8fbfcbb0ba0754a46115143c2c">SECP256K1_WARN_UNUSED_RESULT</a> int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="lax__der__privatekey__parsing_8h.html#ab0172ae6ae0adcf65b3d94960ece8e31">ec_privkey_export_der</a> (const <a class="el" href="secp256k1_8h.html#a282ec9e6dfec8c35955c3eb2f7476e5e">secp256k1_context</a> *<a class="el" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>, unsigned char *privkey, size_t *privkeylen, const unsigned char *seckey, int compressed) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(1) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(2) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(3) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(4)</td></tr>
<tr class="separator:ab0172ae6ae0adcf65b3d94960ece8e31"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a73106d5c4a234faa276659a29efe11d3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="secp256k1_8h.html#aebd5ca8fbfcbb0ba0754a46115143c2c">SECP256K1_WARN_UNUSED_RESULT</a> int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="lax__der__privatekey__parsing_8h.html#a73106d5c4a234faa276659a29efe11d3">ec_privkey_import_der</a> (const <a class="el" href="secp256k1_8h.html#a282ec9e6dfec8c35955c3eb2f7476e5e">secp256k1_context</a> *<a class="el" href="tests_8c.html#a06a3e29ada83211a695a49e8f7405842">ctx</a>, unsigned char *seckey, const unsigned char *privkey, size_t privkeylen) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(1) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(2) <a class="el" href="secp256k1_8h.html#a03c194d8fa91b9b66758b36c91e0b5cb">SECP256K1_ARG_NONNULL</a>(3)</td></tr>
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<h2 class="groupheader">Function Documentation</h2>
<a id="ab0172ae6ae0adcf65b3d94960ece8e31"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab0172ae6ae0adcf65b3d94960ece8e31">&#9670;&nbsp;</a></span>ec_privkey_export_der()</h2>
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<td class="memname"><a class="el" href="secp256k1_8h.html#aebd5ca8fbfcbb0ba0754a46115143c2c">SECP256K1_WARN_UNUSED_RESULT</a> int ec_privkey_export_der </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="secp256k1_8h.html#a282ec9e6dfec8c35955c3eb2f7476e5e">secp256k1_context</a> *&#160;</td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">unsigned char *&#160;</td>
<td class="paramname"><em>privkey</em>, </td>
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<td class="paramtype">size_t *&#160;</td>
<td class="paramname"><em>privkeylen</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const unsigned char *&#160;</td>
<td class="paramname"><em>seckey</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>compressed</em>&#160;</td>
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<p>Export a private key in DER format.</p>
<p>Returns: 1 if the private key was valid. Args: ctx: pointer to a context object, initialized for signing (cannot be NULL) Out: privkey: pointer to an array for storing the private key in BER. Should have space for 279 bytes, and cannot be NULL. privkeylen: Pointer to an int where the length of the private key in privkey will be stored. In: seckey: pointer to a 32-byte secret key to export. compressed: 1 if the key should be exported in compressed format, 0 otherwise</p>
<p>This function is purely meant for compatibility with applications that require BER encoded keys. When working with secp256k1-specific code, the simple 32-byte private keys are sufficient.</p>
<p>Note that this function does not guarantee correct DER output. It is guaranteed to be parsable by secp256k1_ec_privkey_import_der </p>
<p class="definition">Definition at line <a class="el" href="lax__der__privatekey__parsing_8c_source.html#l00056">56</a> of file <a class="el" href="lax__der__privatekey__parsing_8c_source.html">lax_der_privatekey_parsing.c</a>.</p>
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<a id="a73106d5c4a234faa276659a29efe11d3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a73106d5c4a234faa276659a29efe11d3">&#9670;&nbsp;</a></span>ec_privkey_import_der()</h2>
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<td class="memname"><a class="el" href="secp256k1_8h.html#aebd5ca8fbfcbb0ba0754a46115143c2c">SECP256K1_WARN_UNUSED_RESULT</a> int ec_privkey_import_der </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="secp256k1_8h.html#a282ec9e6dfec8c35955c3eb2f7476e5e">secp256k1_context</a> *&#160;</td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">unsigned char *&#160;</td>
<td class="paramname"><em>seckey</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const unsigned char *&#160;</td>
<td class="paramname"><em>privkey</em>, </td>
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<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>privkeylen</em>&#160;</td>
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<p>Import a private key in DER format. Returns: 1 if a private key was extracted. Args: ctx: pointer to a context object (cannot be NULL). Out: seckey: pointer to a 32-byte array for storing the private key. (cannot be NULL). In: privkey: pointer to a private key in DER format (cannot be NULL). privkeylen: length of the DER private key pointed to be privkey.</p>
<p>This function will accept more than just strict DER, and even allow some BER violations. The public key stored inside the DER-encoded private key is not verified for correctness, nor are the curve parameters. Use this function only if you know in advance it is supposed to contain a secp256k1 private key. </p>
<p class="definition">Definition at line <a class="el" href="lax__der__privatekey__parsing_8c_source.html#l00012">12</a> of file <a class="el" href="lax__der__privatekey__parsing_8c_source.html">lax_der_privatekey_parsing.c</a>.</p>
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